#!/bin/sh# perf stat tests# SPDX-License-Identifier: GPL-2.0 set -e err=0test_default_stat() {  echo "Basic stat command test"  if ! perf stat true 2>&1 | grep -E -q "Performance counter stats for 'true':"  then    echo "Basic stat command test [Failed]"    err=1    return  fi  echo "Basic stat command test [Success]"} test_stat_record_report() {  echo "stat record and report test"  if ! perf stat record -o - true | perf stat report -i - 2>&1 | \    grep -E -q "Performance counter stats for 'pipe':"  then    echo "stat record and report test [Failed]"    err=1    return  fi  echo "stat record and report test [Success]"} test_stat_repeat_weak_groups() {  echo "stat repeat weak groups test"  if ! perf stat -e '{cycles,cycles,cycles,cycles,cycles,cycles,cycles,cycles,cycles,cycles}' \     true 2>&1 | grep -q 'seconds time elapsed'  then    echo "stat repeat weak groups test [Skipped event parsing failed]"    return  fi  if ! perf stat -r2 -e '{cycles,cycles,cycles,cycles,cycles,cycles,cycles,cycles,cycles,cycles}:W' \    true > /dev/null 2>&1  then    echo "stat repeat weak groups test [Failed]"    err=1    return  fi  echo "stat repeat weak groups test [Success]"} test_topdown_groups() {  # Topdown events must be grouped with the slots event first. Test that  # parse-events reorders this.  echo "Topdown event group test"  if ! perf stat -e '{slots,topdown-retiring}' true > /dev/null 2>&1  then    echo "Topdown event group test [Skipped event parsing failed]"    return  fi  if perf stat -e '{slots,topdown-retiring}' true 2>&1 | grep -E -q "<not supported>"  then    echo "Topdown event group test [Failed events not supported]"    err=1    return  fi  if perf stat -e '{topdown-retiring,slots}' true 2>&1 | grep -E -q "<not supported>"  then    echo "Topdown event group test [Failed slots not reordered first]"    err=1    return  fi  echo "Topdown event group test [Success]"} test_topdown_weak_groups() {  # Weak groups break if the perf_event_open of multiple grouped events  # fails. Breaking a topdown group causes the events to fail. Test a very large  # grouping to see that the topdown events aren't broken out.  echo "Topdown weak groups test"  ok_grouping="{slots,topdown-bad-spec,topdown-be-bound,topdown-fe-bound,topdown-retiring},branch-instructions,branch-misses,bus-cycles,cache-misses,cache-references,cpu-cycles,instructions,mem-loads,mem-stores,ref-cycles,cache-misses,cache-references"  if ! perf stat --no-merge -e "$ok_grouping" true > /dev/null 2>&1  then    echo "Topdown weak groups test [Skipped event parsing failed]"    return  fi  group_needs_break="{slots,topdown-bad-spec,topdown-be-bound,topdown-fe-bound,topdown-retiring,branch-instructions,branch-misses,bus-cycles,cache-misses,cache-references,cpu-cycles,instructions,mem-loads,mem-stores,ref-cycles,cache-misses,cache-references}:W"  if perf stat --no-merge -e "$group_needs_break" true 2>&1 | grep -E -q "<not supported>"  then    echo "Topdown weak groups test [Failed events not supported]"    err=1    return  fi  echo "Topdown weak groups test [Success]"} test_default_stattest_stat_record_reporttest_stat_repeat_weak_groupstest_topdown_groupstest_topdown_weak_groupsexit $err